2013年3月22日
查询表中相同数据的sql语句
摘要： 1、查询表中重复数据。select * from people where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 2、删除表中多余的重复记录，重复记录是根据单个字段（peopleId）来判断，只留有rowid最小的记录 delete from people where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) a... 阅读全文
posted @ 2013-03-22 10:56 黑武飞翔 阅读(912) 评论(0) 推荐(0)